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lcd program for at 89s52 in embeded c
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Tyro LPC2129 Arm7 Board
ARM7 LPC2129 Tyro Board specifically designed to help students master the necessary skills in the field of embedded systems. This kit is designed in such a way that all possible features of the microcontroller to be easily used by students With support in system programming (ISP), which is accessed through the serial port.
Company NXP ARM7 (LPC2129), a Suite of tyro, ARM to smooth the progress of the design and debugging of various designs, covering high speed 32-bit microcontrollers.
I2c (Inter Integrated Circuit)
I2C (Inter-IC) bus a bidirectional 2-wire serial bus that provides a channel of communication between integrated circuits (ICS).I2C is a synchronous protocol, which enables the host device to initiate communication with the slave device. Exchange of data between the devices.
RTC (Real Time Clock)
DS1307 Serial real-time Clock is low power consumption; full binary coded decimal (BCD) clock/calendar plus 56 bytes of Nv SRAM. Address and data are transferred serially through a 2-wire, bi-directional bus. clock/calendar provides seconds, minutes, hours, day, date, month, and year information. the end of the day the month automatically adjusts for months with less than 31 days, including corrections for leap year. hours of work in 24-hour or 12-hour format with AM/PM indicator.
RTC I2C Interface
Fig. 1 shows how connected to the microcontroller'S EEPROM via I2C. I2C is a Master-Slave Protocol. I2C clock pulse along with the data. the leading device controls the clock SCL line. This line dictates the terms of all transfers on the I2C bus. No data will be transferred, if the watch is not manipulated.
The I2C bus supports multiple devices, each device is a unique address, the interface of micro-controller, LCD driver, memory or keypad and can work as a transmitter or receiver based on the functioning of the device. the controller is controlling the DS1307 RTC I2C Protocol device.I2c controller here acts as the master device and controls the RTC DS1307, who acts as the slave. The read operation is carried out by sending a set of control signals, including address and/or bits of data. The control signals must be accompanied by appropriate clock.